My betta that I have had in a 10 gallon with 6 tetras is becoming multi colored and very lifeless. His once deep blue had (in 9 hours) turned into a grayish black. What could be happening??? His tail fins look a bit shredded too. Could the tetras be fin nipping? I haven't seen them even go near him. I am truly upset. I just moved him from the tank into a 1 gallon bowl for lack of anything better to do and quickly jumped on here for some professional guidance!! Please, any info would be greatly appreciated. I am in he process of cycling the tank BUT have been testing the water and doing major water changes non-stop. What could this be???? :sad: